The purpose of this study is to determine whether the timing of prophylactic antibiotics at cesarean delivery influences maternal/neonatal infectious morbidity and/or negatively impacts upon the neonatal course.In this prospective randomized study, we studied the timing of prophylactic antibiotic in women undergoing elective cesarean section. Randomization of 480 women was carried out by a computer-based allocation of each study number to either skin incision group(A), or cord clamping group (B) .One gm ceftriaxone was given to patients with intact membranes undergoing elective cesarean section either at skin incision, group A, or at cord clamping, group B.In the present study, we did not note a statistical difference between the two groups in rates of endometritis, (P>0.05), wound infection, (P>0.05) or other maternal or neonatal infectious morbidity.